🏄‍♀️ Surf’s Up! Preparing for Huge Waves of Traffic via Load Testing

This post details the strategy and implementation of load testing for Slack's Enterprise Key Management (EKM) service. It outlines 6 steps: identifying critical paths (chat.postMessage), gathering baseline metrics (simulating double peak customer load), creating consistent test environments (tool for spinning up identical orgs), consolidating load testing tools into a single Go-based service with a CLI, automating machine provisioning with a `slack loadtest --bootstrap` command, and tracking metrics (API error rates, EKM latency, database health). It also provides an example of testing the `chat.postMessage` API with the new tool and discusses the importance of onboarding and documentation to drive adoption of the load testing framework across engineering.